What I have is that no matter what you install in the conduit ... be it twin+e ... cat5/6/7 or coax ... the result is the same ...it fails.

I have always used the best quality solution .. .but over time trying to keep up with the market ... I have been using cheaper solutions to get the job ... which results in failed equipment ... not a bad thing because it creates more work ... people understand that everything in this day and age is rubbish quality ... if the product quality is good generally the service or support is crap (Hilti is a good example of this)